Two-wave mixing of laser narrow beams in Fe :LiNbO_3 crystals;
狭窄激光光束在掺铁铌酸锂晶体中的双波耦合(英文)
He then shines a narrow beam in horizontally through the pinhole.
然后他通过小孔水平地射入一窄光束。
This laser beam covers a very narrow range of frequencies.
这种激光束的频率范围很窄。
A beam of radiant energy in the form of a narrow cone or cylinder.
光线锥窄圆锥体或圆柱形的辐射性光束
Measurement of Velocity Distribution in Strontium Atomic Beam by Diode Laser with Narrow Line Width
利用窄线宽激光测量锶原子束速率分布
A thin line or narrow beam of light or other radiant energy.
光线，放射线极细的一条或极窄的一束亮光或其它辐射能
Under astigmatism even narrow parallel light beams will not combine into one point.
有象散存在时甚至很窄的平行光束都不能会聚在一点。
Spectrally narrow pulsed dye laser without intracavity beam expander and etalon
无腔内扩束器和标准具的窄谱线脉冲染料激光器
Laser: Acronym for light amplification by stimulated emission of radiation, Concentrated light bean with narrow width used in creating images, engraving, etc.
激光:由刺激产生幅射而强化的光。它是集中的窄幅光束，可作产生影像，雕刻等用途。
illuminating laser beam
照射激光束，照明激光束
collimated lihgt beam
准直光束，平行光束
Study of Laser Beam Width, Beam Quality and Focal Shift;
激光光束束宽、光束质量和焦移的研究
luminous flux
【物】光束, 光通量
double-beam grating spectrophotometer
双光束光栅分光光度计
narrow-band optical bandpass filter
窄带光学带通滤波器
Realization of Ultra-narrow Gap Welding with Flux Strips Constraining Arc;
焊剂带约束电弧超窄间隙焊接的实现
Constricted Arc by Flux Strips Applied to Ultra-narrow Gap Welding
焊剂带约束电弧用于超窄间隙的焊接
double - beam spectrodensitometer
双光束分光光密度计
collimated laser beam
激光平行光束，平行激光束